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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Correlation between microstructure and corrosion behaviour of Bi-Zn solder alloys

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Autor(es):
Septimio, Rudimylla S. [1] ; Arenas, Maria A. [2] ; Conde, Ana [2] ; Garcia, Amauri [1] ; Cheung, Noe [1] ; de Damborenea, Juan [2]
Número total de Autores: 6
Afiliação do(s) autor(es):
[1] Univ Estadual Campinas, UNICAMP, Dept Mfg & Mat Engn, BR-13083860 Campinas, SP - Brazil
[2] CSIC, CENIM, Natl Ctr Met Res, Madrid - Spain
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: CORROSION ENGINEERING SCIENCE AND TECHNOLOGY; v. 54, n. 4, p. 362-368, MAY 19 2019.
Citações Web of Science: 0
Resumo

Bi-Zn solder alloys with different Zn contents (1.5, 2.7 and 5wt-%) were prepared by casting and the correlation between the microstructure and corrosion behaviour by mean of direct current electrochemical tests was studied. The surface analysis of the hypoeutectic Bi-Zn alloy samples revealed the presence of needle-like ZnO and very small agglomerated spherical particles. By contrast, eutectic alloy presented the formation of a uniform and compact film of ZnO, which is related to the better distribution of Zinc in the Bi-rich matrix. Despite the increase in Zn content compared to the hypoeutectic alloy, the corrosion rate showed similar values regardless of its content in the alloy. The Bi-5wt-% Zn alloy presented the highest limiting current density, and consequently, the highest degree of corrosion of the studied alloys. The pro-eutectic phase consisting of large and thick Zn fibres is preferentially dissolved, promoting a selective attack that penetrates inside the sample. (AU)

Processo FAPESP: 17/16058-9 - Microestruturas de Solidificação e Resistência ao Desgaste de Ligas Monotéticas Zn-Al-Bi
Beneficiário:Noe Cheung
Linha de fomento: Bolsas no Exterior - Pesquisa
Processo FAPESP: 17/15158-0 - Caracterização microestrutural e de propriedades na avaliação de ligas para contato térmico interfacial
Beneficiário:Amauri Garcia
Linha de fomento: Auxílio à Pesquisa - Regular